Gray, P. (1961). The Encyclopedia of the biological sciences. Reinhold Publishing Corporation.
Cita Chicago Style (17a ed.)Gray, Peter. The Encyclopedia of the Biological Sciences. New York: Reinhold Publishing Corporation, 1961.
Cita MLA (9a ed.)Gray, Peter. The Encyclopedia of the Biological Sciences. Reinhold Publishing Corporation, 1961.
Precaución: Estas citas no son 100% exactas.